Float gauge for automobile radiators



Dec. 9, 1924- l. S. DAVIS FLOAT GAUGE FOR AUTOMOBILE RADIATORS Filed Nov. 2, 1921 i L ft Patented Dec. 9, 1924.

U I ED, STA

To all whom it may Be it known that citizen of the United States, residing at Rosellefin the county of-Union and State of New Jersey, have invented certain new and useful Improvements in Automobile Radiators, of which the following is a specification.

Thi invention relates to improvements in float gauges, for mdicating the water level in'automobile radiators, of the type comprising a head of suitable design which projects above the radiator cap and supports a Y gauge glass, a tube extending below the cap.

into the water space taken apart.

In the accompanying drawing,

Fig. 1 is a rear elevation of the indicator, partly in central section, showing the same applied to an automobile radiator, a part of the latter being shown in section;

Fig. 2 is a perspective view of the float;

and,

Fig. 3 is a section on the line v3-3 of Fig. l.

eferring to the drawing, (1!. represents the top of an automobile radiator, b the filling tube, and c the cap or closure for thetu'be, which latter. is provided with a central opening 1 adapted "to receive the float gauge.- The oat gauge comprises a hollow head d,

IRVING S.,DAVIS, 0F ROSELLE, NEW FLOAT GAUGE FOR AUTOMOBILE RADIATOltS.

Applicationfiled November 2, 1921. Serial No. 512,257.

concern:

I. IRVING S. DAVIS, a

bore 12.

Float Gauges for in the raidator, a float cork body alone,

overcome as far as and taken apart.

design shown, having in position and also serves an indicating rod 6, which is attached to a float f and extends through the bore in the plug and into the gauge glass. Preferably, a'washer 13 of relatively soft metal is placed between the plug and the bottom of the gauge glass to avoid injury to the glass by the turning movement of the plug when the latter is tightened. A tube 9, pre-ferably of copper, is threaded on to the nipple 11 and extends downwardly into the water 7 space in the radiator, this tube being provided with a vent opening 17, near its upper end and with a suitable stop 14 at its lower end, the latter to prevent the float from passing out of the tube when the water becomes-very low. The stop, is shown in the drawing in the form of an apertured cap.

tube. possible the forces of 90. adhesion and capillary attraction between the tube and float, and to lessen the friction, I surround the cork with a thin aluminum shell, and, thus enclosed, the float moves with freedom in the tube.

The float gauge can be rea By removing the tube g, the float and indicating rod can be taken .m assembled TES PATENT OFFICE.

nipple is internally threaded and adapted to receive a screw plug 11,which has a central Thisplug holds the gauge glass as a guide for 60 The float cons1sts of a cylinder of cork 15, surrounded 'by a thin cylindrical shell or casing of metal 16, preferably aluminum, be cause if its lig tness. The indicating rod e,

' which is made of aluminum, within an axial bore in the cork. The cork float with aluminum indicating rod is very light and floats readily in the water, but the 55 without the surrounding metal casing, would not work satisfactorily because of the tendency of the cork body to adhere to the sides of the In order tofitting gauge glass 8 and the a head is internally thickened, as-

cated dotted "lines.

preferably of the cart-shaped sidewalls 2, and a front wall out, and by removing the plug 11 the gauge 3, which latter has a circular opening 3, glass can be pushed out through the opening 100. ada ted to receive a name plate 4. The in the base and nipple of the head. The uphea has a base 5 of larger diameter than the per end of the indicating rod, which is visiopening in the cap, and an externally ble from the drivers seat, will indicate the threaded nipple 6, which extends through water-level in the radiator. The plug 12 V the opening in the cap, the base and nipple forms a relatively short guide through bein integral with the head. The nipple. which the rod e may-move w1th a minimum' and' ase having a. bore 7 to receive a closely amount of friction. Since the lifting power x of the of the float is only a. small fraction of an I own at 9, ounce, it is desirable to eliminate friction andbored to form a socket 10, for receiving on the rod as much as possible.

uge glass, as indi- What I claim is:

e lower end of the '1, In a. water level the u per end of the P indicator, a hollow head having a socket in its upper part and having a base and nipple provided with a bore alining with said socket, said socket, base and nipple being integral with the head, a gauge glass fitting in said bore and socket, a relatively short plug threaded into said bore and adapted to support the gauge glass, said plug having a central bore. a tube having a threaded engagement with said nipple, a float Within the tube, and an indicating rod attached to said float and extending through the bore in the plug and into the gauge glass.

2. In a Water level indicator for automobile radiators, a head, a gauge glass mounted in the head, a tube detachably connected to the head, a float in said tube comprising a cork body and a metal shell encasing said body, and an indicating rod extending from the float into said gauge glass.

3. In a water level indicator for automobile radiators, a head, a gauge glass mounted in the head, a tube det-achably connected i to the head. a float in said tube comprising a cork body and a shell of aluminum encasing said body, and an aluminum indicating rod extending from the float into the gauge glass.

In testimony \vlie'reol l allix my signature.

IRVING S. DA YIS. 

